Download Newport 818P Thermopile detector

818P Series
High Power Detector
User’s Manual
i
Warranty
Newport Corporation warrants that this product will be free from defects in
material and workmanship and will comply with Newport’s published
specifications at the time of sale for a period of one year from date of shipment.
If found to be defective during the warranty period, the product will either be
repaired or replaced at Newport's option.
To exercise this warranty, write or call your local Newport office or
representative, or contact Newport headquarters in Irvine, California. You will
be given prompt assistance and return instructions. Send the product, freight
prepaid, to the indicated service facility. Repairs will be made and the
instrument returned freight prepaid. Repaired products are warranted for the
remainder of the original warranty period or 90 days, whichever is longer.
Limitation of Warranty
The above warranties do not apply to products which have been repaired or
modified without Newport’s written approval, or products subjected to
unusual physical, thermal or electrical stress, improper installation, misuse,
abuse, accident or negligence in use, storage, transportation or handling. This
warranty also does not apply to fuses, batteries, or damage from battery
leakage.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.
NEWPORT CORPORATION SHALL NOT BE LIABLE FOR ANY
INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES RESULTING
FROM THE PURCHASE OR USE OF ITS PRODUCTS.
First printing 2004
© 2004 by Newport Corporation, Irvine, CA. All rights reserved. No part of
this manual may be reproduced or copied without the prior written approval
of Newport Corporation.
This manual has been provided for information only and product
specifications are subject to change without notice. Any change will be
reflected in future printings.
Newport Corporation
1791 Deere Avenue
Irvine, CA, 92606
USA
P/N 41313-01 Rev. C
ii
Declaration of Conformity
We declare that the accompanying product, the model 818P, identified
with the
mark, meets the intent of the Electromagnetic Compatability
Directive, 89/336/EEC and Low Voltage Directive 73/23/EEC.
Manufacturer’s Name:
Manufacturer’s Address:
Type of Equipment:
Model No.:
Year of test & manufacture:
Newport Corporation
1791 Deere Avenue
Irvine, CA 92606
USA
Laser Power Detector
818P
2002
Standard(s) to which Conformity is declared:
Standard
Description
EN 61326 :1997
Limits and methods of measurement of radio interference
characteristics of information technology equipment.
Testing and measurements of conducted emission
Limits and methods of measurement of radio interference
characteristics of information technology equipment.
Testing and measurements of radiated emission
Electromagnetic compatibility (EMC) – Part 4: Testing
and measurements techniques- Section 4.2: Electrostatic
discharge.
Electromagnetic compatibility (EMC) – Part 4: Testing
and measurements techniques- Section 3: Radiated,
Radio Frequency immunity.
Radiated Electromagnetic field from digital radio
telephones- immunity test 900MHz pulsed
Electromagnetic compatibility (EMC) – Part 4: Testing
and measurements techniques- Section 4: Electrical fast
transient/burst immunity.
Electromagnetic compatibility (EMC) – Part 4: Testing
and measurements techniques- Section 6: Immunity to
conducted Radio Frequency.
EN 61326 : 1997
EN 61000-4-2:1995
EN 61000-4-3:1996
ENV 50204: 1995
EN 61000-4-4:1995
EN 61000-4-6:1996
Performance
Criteria
Class A
Class A
Class B
Class A
Class A
Class B
Class A
I, the undersigned, hereby declare that the equipment specified above conforms to the above
Directive(s) and Standard(s).
Alain Danielo
VP European Operations
Zone Industrielle
45340 Beaune-la-Rolande, France
Dan Dunahay
Director of Quality Systems
1791 Deere Avenue
Irvine, CA USA
iii
Technical Support Contacts
North America & Asia
Europe
Newport Corporation Service Dept.
Newport/MICRO-CONTROLE S.A.
1791 Deere Ave. Irvine, CA 92606
Zone Industrielle
Telephone: (949) 253-1694
45340 Beaune la Rolande, FRANCE
Telephone: (800) 222-6440 x31694
Telephone: (33) 02 38 40 51 56
Asia
Newport Opto-Electronics
Technologies
253 Aidu Road, Bld #3, Flr 3, Sec C,
Shanghai 200131, China
Telephone: +86-21-5046 2300
Fax: +86-21-5046 2323
Newport Corporation Calling Procedure
If there are any defects in material or workmanship or a failure to meet
specifications, promptly notify Newport's Returns Department by calling
1-800-222-6440 or by visiting our website at www.newport.com/returns within
the warranty period to obtain a Return Material Authorization Number
(RMA#). Return the product to Newport Corporation, freight prepaid, clearly
marked with the RMA# and we will either repair or replace it at our
discretion. Newport is not responsible for damage occurring in transit and is
not obligated to accept products returned without an RMA#.
E-mail: [email protected]
When calling Newport Corporation, please provide the customer care
representative with the following information:
•
•
•
Your Contact Information
Serial number or original order number
Description of problem (i.e., hardware or software)
To help us diagnose your problem, please note the following conditions:
•
•
•
•
Is the system used for manufacturing or research and development?
•
Can you identify anything that was different before this problem
occurred?
What was the state of the system right before the problem?
Have you seen this problem before? If so, how often?
Can the system continue to operate with this problem? Or is the system
non-operational?
iv
Safety Information
Do not use the 818P detector if it looks damaged, or if you suspect that
the 818P is not operating properly.
Appropriate installation must be done for water-cooled and fan-cooled
detectors. Refer to the specific instructions for more information. The
user must wait for a while before handling these detectors after power is
applied. Surfaces of the detectors get very hot and there is a risk of
injury if they are not allowed to cool down.
Note: This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and
on, it is suggested to try to correct the interference by taking one or more
of the following steps:
•
•
•
•
Reorient or relocate the receiving antenna.
Increase the distance between the equipment and receiver.
Connect the equipment to an outlet that is on a different circuit than
the receiver.
Consult the dealer or an experienced radio/TV technician for help.
SYMBOLS
The following international symbols are used in this manual:
Refer to the manual for specific Warning or Caution information to avoid any
damage to the product.
v
Table of Contents
Warranty
i
Declaration of Conformity
ii
Technical Support Contacts
iii
Safety Information
iv
List of Illustrations
vi
1 General Information
1
1.1
1.2
Introduction................................................................................. 1
818P Series DB-15 Connector .................................................... 2
2 Specifications
2.1
2.2
Standard Operating Mode ......................................................... 3
Calorimeter Mode....................................................................... 7
3 Operating Instructions
3.1
3.2
3.3
3.4
3.5
8
Detector Preparation .................................................................. 8
3.1.1 Fan-Cooled Detectors ..................................................... 8
3.1.2 Water-cooled detectors ................................................... 8
Using with the 841-PE or 841-P-USB........................................ 9
Using without the 841-PE or 841-P-USB .................................. 9
Safety Notes ............................................................................... 11
3.4.1 Diffusive surfaces .......................................................... 11
3.4.2 Detector temperature.................................................... 11
Damage to the Optical Absorber Material ............................. 11
4 Service Information
4.1
3
12
Service Form.............................................................................. 13
Appendix A: Custom Heat Sink
15
vi
List of Illustrations
Figure 1 Tapped hole positions - 818P-XX-19 ....................................... 15
Figure 2 Tapped hole positions - 818P-XX-25 and 818P-XX-55 .......... 16
GET FREE UPDATES
Check Newport’s website periodically for firmware, software and manual
updates. Go to www.newport.com for the latest versions.
1
1 General Information
1.1 Introduction
Newport’s 818P Series High Power Detector’s are thermopile devices
that are specifically designed to work with Newport’s 841-PE Hand-Held
Power/Energy Meter or the 841-P-USB Virtual Meter. They may also be
used with other instruments by means of various adapter cables (see
Sections 1.2 & 3.3 for more information).
The 818P Series Detectors may be grouped into four distinct product
families, based on active area size:
•
818P-XX-12 detectors have dimensions of 38 x 38 mm and an
aperture of 12 mm.
•
818P-XX-18 detectors have dimensions of 50 x 50 mm and an
aperture of 18 mm.
•
818P-XX-19 detectors have dimensions of 50 x 50 mm and an
aperture of 19 mm.
•
818P-XX-25 detectors have dimensions of 89 x 89 mm and an
aperture of 25 mm.
•
818P-XX-55 detectors have dimensions of 89 x 89 mm and an
aperture of 55 mm.
The 818P-XX-18 detectors utilize surface absorber sensors and are
designed for use at high average power densities.
Within each group are various individual detectors with different
cooling options: stand alone, heat sink, fan or water.
The 818P detectors can measure between:
•
10 mW and 70 W of average power for 818P-XX-12 series.
•
10 mW and 30 W of average power for 818P-XX-18 series.
•
20 mW and 150 W of average power for 818P-XX-19 series.
•
60 mW and 300 W of average power for 818P-XX-25 series.
•
100 mW and 400 W of average power for 818P-XX-55 series.
2
All 818P series detectors are supplied with a 180 cm flexible cable with a
DB-15 connector termination. More about this connector in the next
section.
CAUTION
To eliminate possible damage, do not carry the detector using the
connector cable.
When using a detector with a heat sink, the fins should always be
oriented vertically. Call your nearest Newport distributor to replace the
sensor disk and/or to recalibrate the detector.
1.2 818P Series DB-15 Connector
The DB-15 male connector found at the end of the cable contains an
EEPROM (Erasable Electrical Programmable Read-Only Memory)
programmed with calibration sensitivity and other data relating to the
specific 818Pdetector in use.
Fast set-ups are attained because the 841-PE Handheld Meter and the
841-P-USB Virtual Meter automatically adjusts to the characteristics of
the detector after reading the EEPROM. The 818E EEPROM can also
be read by Newport’s 1835-C and 2835-C meters when using the 818PDIN adapter cable (sold separately).
The DB-15 connector pin-out is as follows:
1USED BY 841-PE
2"
"
"
3"
"
"
4"
"
"
5"
"
"
6“+” SIGNAL OUTPUT
7USED BY 841-PE
8"
"
"
9"
"
"
10"
"
"
11"
"
"
12"
"
"
13“-“ SIGNAL OUTPUT
14USED BY 841-PE
15"
"
"
SHELLCOAX SHIELD / BODY GRND
3
2 Specifications
2.1 Standard Operating Mode
The following four tables contain specifications when operating in the
standard power mode (i.e. when measuring average power, in Watts).
818P-010/ 020/ 070-12
Effective Aperture Diameter
Wavelength Range
Power Noise Level
Calibration Uncertainty
Linearity with Power
Repeatability (Precision)
Power Resolution
Max. Average Power
818P-010-12
818P-020-12
818P-070-12
Max. Average Power (2 min)1
818P-010-12
818P-020-12
818P-070-12
Max. Average Power Density
@ 1.064 µm, 10W CW
@ 10.6 µm, 10W CW
Pulsed Laser Damage Thresholds
1.064 µm, 360 µs, 5 Hz
1.064 µm, 7 ns, 10 Hz
532 nm, 7 ns, 10 Hz
266 nm, 7 ns, 10 Hz
Dimensions (H x W x D) mm
818P-010-12
818P-020-12
818P-070-12
Weight (kg)
818P-010-12
818P-020-12
818P-070-12
Minimum Cooling Flow2
Recommended Cooling Flow
Cooling
Typical Sensitivity
Recommended Load Impedance
Typical Rise Time (0-95%)
Linearity vs. Beam Dimension
1
12 mm
190nm – 11µm
1 mW
±2.5 %
±2 %
±0.5 %
±0.5 %
10 W
20 W
70 W
15 W
30 W
90 W
36 kW/cm2
11 kW/cm2
Max. Energy Density
5 J/cm2
1.0 J/cm2
0.6 J /cm2
0.3 J /cm2
Peak Power Density
14 kW/cm2
143 MW/cm2
86 MW/cm2
43 MW/cm2
38 x 38 x 14
38 x 38 x 45
38 x 38 x 32
0.13
0.15
0.19
0.5 liter/min
1.0 liter/min
Heat sink / water
0.6 mV/W
100 kΩ
1.6s (0.3s with anticipation)
±0.7 %
cooling : minimum 3 min.
Water temperature ≤ 22°C, 1/8 NPT compression fittings for ¼ inch semi-rigid tube.
2
4
818P-15 / 30-18
Effective Aperture Diameter
Wavelength Range
Min. Measurable Power
Power Noise Level
Calibration Uncertainty
Linearity with Power
Repeatability (Precision)
Power Resolution
Max. Average Power
818P-15-18
818P-30-18
Max. Average Power (2 min.)3
818P-15-18
818P-30-18
Max. Average Power Density
1.064µm CW
Pulsed Laser Damage Thresholds
1.064 µm , 360 µs, 10 Hz
1.064 µm , 7 ns, 10 Hz
532 nm , 7 ns, 10 Hz
266 nm , 7 ns, 10 Hz
Dimension (H x W x D) mm
818P-15-18
818P-30-18
Weight (kg)
818P-15-18
818P-30-18
Cooling
Typical Sensitivity
Recommended Load Impedance
Typical Rise time (0-95%)
Linearity vs. Beam Dimension
18 mm
190 nm – 2.5 µm
20 mW
1 mW
±2.5%
±2%
±0.5%
±0.5%
15 W
30 W
23 W
40 W
110 W/cm2
Peak Power Density
30 kW/cm2
571 MW/cm2
428 MW/cm2
143 MW/cm2
Max. Energy Density
11 J/cm2
4 J/cm2
3 J /cm2
1J /cm2
50 x 50 x 20.6
50 x 50 x 56.3
0.16
0.21
Heat sink
0.8 mV/W
100 kΩ
7.7s (1.8s with anticipation)
±0.5%
Specifications subject to change without notice
3
cooling : minimum 3 min.
5
818P-15 / 30 / 110 / 150-19
Effective Aperture Diameter
Wavelength Range
Min. Measurable Power
Power Noise Level
Calibration Uncertainty
Linearity with Power
Repeatability (Precision)
Power Resolution
Max. Average Power
818P-15-19
818P-30-19
818P-110-19
818P-150-19
Max. Average Power (2 min)4
818P-15-19
818P-30-19
818P-110-19
818P-150-19
Max. Average Power Density
1.064µm CW
10.6 µm CW
Pulsed Laser Damage Thresholds
1.064 µm, 360 µs, 5 Hz
1.064 µm, 7 ns, 10 Hz
532 nm, 7 ns, 10 Hz
266 nm, 7 ns, 10 Hz
Dimensions (H x W x D) mm
818P-15-19
818P-30-19
818P-110-19
818P-150-19
Weight (kg)
818P-15-19
818P-30-19
818P-110-19
818P-150-19
Minimum Cooling Flow5
Recommended Cooling Flow
Cooling
Typical Sensitivity
Recommended load Impedance
Typical Rise time (0-95%)
Linearity vs. Beam Dimension
19 mm
190 nm – 11 µm
20 mW
1 mW
±2.5%
±2%
±0.5%
±0.5%
15 W
30 W
110 W
150 W
23 W
45 W
135 W
170 W
36 kW/cm2
11 kW/cm2
Peak Power Density
14 kW/cm2
143 MW/cm2
86 MW/cm2
43 MW/cm2
Max. Energy Density
5 J/cm2
1.0 J/cm2
0.6 J/cm2
0.3 J/cm2
50 x 50 x 20.6
50 x 50 x 56.3
54.2 x 54.2 x 55.6
50 x 50 x 33
0.16
0.21
0.25
0.24
0.5 liter/min
1.0 liter/min
Heat sink / fan / water
0.7 mV/W
100 kΩ
2.8s (0.6s with anticipation)
±0.5 %
Specifications subject to change without notice
4
cooling : minimum 3 min.
Water temperature ≤ 22°C, 1/8 NPT compression fittings for ¼ inch semi-rigid tube.
5
6
818P-XX-25
818P-XX-55
Aperture Diameter
Spectral Range
Min. Measurable Power
Power Noise Level
Calibration Uncertainty
Linearity with Power
Repeatability (Precision)
Power Resolution
Max. Average Power
Max. Average Power (2 min.)6
Max. Average Power Density
1.064µm CW
10.6 µm CW
Pulsed Laser Damage Thresholds
1.064 µm, 360 µs, 5 Hz
1.064 µm, 7 ns, 10 Hz
532 nm, 7 ns, 10 Hz
266 nm, 7 ns, 10 Hz
Dimensions (H x W x D) mm
Weight (kg)
Minimum Cooling Flow7
Cooling
Typical Sensitivity
Recommended Load Impedance
Typical Response Time (0-95%)
Linearity vs. Beam Dimension
818P-40/100/250/300-25
818P-40/100/300/400-55
25mm
55mm
190 nm-11 µm
60 mW
3 mW
100 mW
5 mW
±2.5%
±2%
±0.5%
±0.5%
40: 40 W
100: 100 W
250: 250 W
300: 300 W
40: 60 W
100: 150 W
250: 300 W
300: 300 W
40: 40 W
100: 100 W
300: 300 W
400: 400 W
40: 60 W
100: 150 W
300: 300 W
400: 400 W
45 kW/cm2
14 kW/cm2
Max. Energy Density
9 J/cm2
1.0 J/cm2
0.6J /cm2
0.3J /cm2
40: 89 x 89 x 32
100: 89 x 89 x 106
250: 89 x 89 x 116
300: 89 x 89 x 44
40: 0.68
100: 0.99
250: 1.44
300: 0.90
Peak Power Density
25 kW/cm2
143 MW/cm2
86 MW/cm2
43 MW/cm2
40: 89 x 89 x 32
100: 89 x 89 x 106
300: 89 x 89 x 116
400: 89 x 89 x 44
40: 0.62
100: 0.93
300: 1.38
400: 0.84
1 liter/min
Heat sink/ Fan / Water
0.26 mV/W
0.13 mV/W
>100kΩ
>100kΩ
5s (1.3s with anticipation)
11s (2s with anticipation)
±0.5%
±0.5%
Specifications subject to change without notice
6
7
cooling : minimum 3 min.
Water temperature ≤ 22°C, 1/8 NPT compression fittings for ¼ inch semi-rigid tube.
7
2.2 Calorimeter Mode
The 818P Series High Power Detectors have an optional mode that is
called Calorimeter Mode. It allows you to measure single shot pulse
energy. This mode is accessible when you use a 818P with an 841-PE, the
841-P-USB, or with your own data acquisition system. The following
specifications apply specifically to this mode. For more information,
refer to the 841-PE and the 841-P-USB instruction manuals or call
Newport.
818P-XX-12
818P-XX-19
0.95 mV/J
0.63 J/W
150 ms
1.5 sec
50 ms
5J
20 mJ
±5%
0.7 mV/J
0.99 J/W
264 ms
4 sec
88 ms
15 J
200 mJ
±5%
Typical Sensitivity
Power Sensitivity / Energy Sensitivity
Typical Rise Time
Minimum Repetition Period
Maximum Pulse Width
Maximum Measurable Energy8
Minimum Measurable Energy
Accuracy
Typical Sensitivity
Power Sensitivity / Energy
Sensitivity
Typical Rise Time
Minimum Repetition Period
Maximum Pulse Width
Maximum Measurable Energy
Minimum Measurable Energy
Accuracy
818P-XX18
818P-XX-25
818P-XX55
0.3 mV/J
0.18 mV/J
0.03 mV/J
2.67 J/W
1.67 J/W
4.25 J/W
900 ms
8 sec
300 ms
28 J
550 mJ
±5%
370 ms
4.6 sec
123 ms
40 J
4J
±5%
1300 ms
11.1 sec
433 ms
200 J
5J
±5%
Specifications subject to change without notice
8
For 1.064 µm; 360 µs pulses.
8
3 Operating Instructions
3.1 Detector Preparation
Depending upon whether your particular detector is air-, fan-, or watercooled, some preliminary steps may be required, as follows:
3.1.1 Fan-Cooled Detectors
Simply connect the fan to a power supply.
3.1.2 Water-cooled detectors
Connect the detector head to a cooling water supply. Use with ¼’’ outer
diameter plastic tubing.
NOTE:
The end of the tube must be cut perpendicular to the tubing; the portion of the
outer tubing wall that slips into the fitting must not be deformed or damaged,
otherwise the connection will not be water-tight.
To connect the detector head fittings to the water supply tubing, unscrew
the two parts of the fitting, push the tubing into the part not connected to
the detector until it comes to the end of the fitting; then screw in the two
parts of the fitting.
The direction of flow through the head is unimportant. Once you have
connected the fittings, check them for leaks. If you find a leak, check to
see if the tubes are pushed in far enough and that the tubing has not
been damaged.
To disconnect the detector head fittings, remove the water pressure and
drain the water from the tubing. Unscrew the two parts of the fitting and
pull out the tubing.
NOTE:
Water will usually remain in the detector head after it is disconnected. It is
possible to remove it by blowing it out, but be careful not to blow the water on
yourself or on the detector aperture. Dry the detector body off before storing it.
9
Be sure that flow rates satisfy the minimum values, as indicated on the
specifications pages (see Section 2). Time variations of water flow rates
or water temperature will cause corresponding oscillations in
measurements.
3.2 Using with the 841-PE or 841-P-USB
Connect the DB15 connector at the end of the cable to the input
connector on the 841-PE or the 841-P-USB meter (see the 841-PE or 841P-USB instruction manuals).
Before performing the measurements, shield the detector head to prevent
it from sensing heat from random sources. To obtain an accurate
reading the 841-PE and the 841-P-USB meters must also be zero
adjusted.
Allow the detector head to thermally stabilize before making any
measurements. Let the signal stabilize for a few seconds before
adjusting the offset. Refer to the 841-PE and the 841-P-USB operating
instructions for further details.
For the most accurate measurements, center the beam on the sensor face.
The beam diameter on the sensor should ideally be the same size as the
beam diameter of the original calibration, which is 86.5% encircled
power (>98% encircled power at full aperture) of a TEM 01 beam (at
1/e2) over 50% of the sensor’s surface (this complies with the
International Electrotechnical Commission standard #1040: "Power and
Energy Measuring Detector...").
3.3 Using without the 841-PE or 841-P-USB
The 818P Series High Power Detectors can be used with a voltmeter or
oscilloscope. Usually these devices have a BNC input connector. For this
reason, an adapter cable (Newport part number 818P-BNC) is available.
This cable is sold separately.
To make a measurement, follow these steps:
1. Let the detector head thermally stabilize for at least 10 minutes.
2. Connect the power head to a precision microvoltmeter,
oscilloscope, or data acquisition system, with a load impedance
that is greater than 100 kΩ. Because of the very low voltages at
lower power levels for some of these detectors, analog or digital
filters may be required to remove ambient electrical noise.
3. Remove the detector cover.
10
NOTE:
For the most accurate measurements, center the beam on the sensor face.
The beam diameter on the sensor should ideally be the same size as the beam
diameter of the original calibration, which is 86.5% encircled power (>98%
encircled power at full aperture) of a TEM 01 beam (at 1/e2) over 50% of the
sensor’s surface (this complies with the International Electrotechnical
Commission standard #1040: "Power and Energy Measuring Detector...").
WARNING:
Be careful not to exceed the maximum levels and densities
stated in the specifications.
4 Place the detector head into the laser beam path (the laser beam
must be contained within the sensor area) for about a minute.
5. Block off any laser radiation to the detector.
6. Switch on the microvoltmeter and adjust its voltage range to the range
required for the measurement. To determine the voltage range to be
measured, refer to the detector head specifications (see Section 2):
Vout = (expected power) x (calibration sensitivity of power detector)
7. Wait until the signal has stabilized (fluctuations representing less than
1% of the voltage level being measured are negligible), then measure the
zero level voltage offset from the detector. Strong fluctuations in the zero
level are usually caused by one of the following:
-
•
Rapid fluctuations in the rate of water flow,
•
Rapid fluctuations in water temperature,
•
Strong drafts or stray radiation (especially visible when
you are taking low power measurements),
Ambient electrical noise (should be filtered out).
8. Apply the laser beam to the detector head.
9. Wait until the signal has stabilized (between one to three minutes
for optimum measurements), then measure the voltage output from
the detector (see Section 2 for individual detector 0-95% non
anticipated response times).
10. The measured power is calculated as follows:
Measured power = (output voltage - zero level voltage) / (calibration sensitivity)
= 1000 x (Vout - Vzero level) / calibration sensitivity (mV/W)
= Watts
11
3.4 Safety Notes
3.4.1 Diffusive surfaces
When using the 818P, be aware of the ~ 5-15% diffused back reflection.
Exception: the 818P-015/030-18 have a 5% specular reflection.
As on any diffusive surface, the light on the sensor coating is scattered
more or less uniformly as a Lambertian diffuser. It is recommended to
use the detector with a black protective sleeve. This will limit wideangled diffused reflections.
3.4.2 Detector temperature
Detectors can become hot enough during usage and can cause burns.
3.5 Damage to the Optical Absorber Material
Damage to the optical absorber material is usually caused by exceeding
the manufacturer's specified maximum incident:
•
Average Power Density
•
Pulse Energy Density
Refer to the specifications pages (Section 2) for the 818P Series High
Power Detector specifications.
Damage may also be caused by using a detector with a contaminated
absorber surface.
Slight discoloration of the coating may occur, but this usually does not
affect the calibration.
In the event of major damage to the coating, the 818P Series sensors can
be recoated. Contact your local Newport representative for information
on repair and recalibration. See page iv: “Technical Support Contacts.”
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4 Service Information
The Model 818P High Power Detector contains no user serviceable parts.
To obtain information regarding factory service, contact Newport
Corporation or your Newport representative. Please have the following
information available:
1. Detector model number (818P-XX)
2. Detector serial number (on rear panel)
3. Description of the problem.
If the detector is to be returned to Newport Corporation, you will be
given a Return Number, which you should reference in your shipping
documents. Please fill out a copy of the service form, located on the
following page, and have the information ready when contacting
Newport Corporation. Return the completed service form with the
instrument.
To obtain warranty service, contact your nearest Newport agent or send
the product, with a description of the problem, transportation and
insurance prepaid, to the nearest Newport agent. Newport Corporation
assumes no risk for the damage in transit. Newport Corporation will, at
its option, repair or replace the defective product free of charge.
However, if Newport Corporation determines that the failure is caused
by misuse, alterations, accident or abnormal condition of operation or
handling, you will be billed for the repair and the repaired product will
be returned to you, transportation prepaid.
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4.1 Service Form
Newport Corporation
U.S.A.
Office: 800-222-6440
FAX: 949/253-1479
Name ___________________________________ Return Authorization # _________________
(Please obtain RA# prior to return of item)
Company _______________________________________________________________________
Address _________________________________ Date _________________________________
Country __________________________________ Phone Number_________________________
P.O. Number______________________________ FAX Number __________________________
Item(s) Being Returned:
Model # _________________________________ Serial #_______________________________
Description _____________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
Reason for return of goods (please list any specific problems):
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
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Notes:
15
Appendix A: Custom Heat Sink
Usually, the detector is calibrated and shipped with its final back panel. But
the 818P can also be installed onto a heat sink supplied by the customer or
onto another back panel. If this is the case, follow the instructions listed
below.
Instructions :
1. Remove the four front screws of the detector, being sure to hold
together the front cover and the central housing.
2.
Discard the back panel.
3.
Apply thermal paste (for example Wakefield Engineering Inc. thermal
paste part no. 120-2) to the back of the central housing to assure good
thermal contact with the new back panel.
4.
Recommended : Apply removable thread locker (for example Loctite
removable thread locker 242) to the ends of the four original screws and
into the four holes on back panel.
5.
Use the four original screws to install the new back panel onto the
detector. Be sure to apply the same torque to all four screws.
Figure 1
Tapped hole positions - 818P-XX-19
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Figure 2
Tapped hole positions - 818P-XX-25 and 818P-XX-